Electrical switch.



G. P. SCHMIUT.

ELECTRICAL SWITCH.

APPLICATION man JAN. 3. 19:2.

L1HL& Patented May 2, 1916,

THE COLUMFHA PLANouawu cc" WASHINGTON, I) c.

GODFREY P. SCHMIDT, OF NEW YORK, N. Y.

ELECTRICAL SWITCH.

Application filed January 3, 1912.

To all whom it may concern: Y

Be it known that I, G'oornnr I. Scinnn'r, a citizen of the United States. residing at the borough of Manhattan. in the county of vented certain new and useful Improvements New York and State of New York, have in- "in Electrical Switches, of which the following is a specification, reference being" had therein to the accompanying drawmg.

invention relates to improvements in electrical switches and has particular reference to a button switch adapted forcutting in and out current for lighting purposes. 1

In the accompanying drawings I have illustrated in Figure 1 in perspective view with 1 parts broken away, part of a switch embodying, one application of my invention. In

, this View for the purpose of clearness I have omitted the usual'porcelain block and outer box, also the knife clips or terminals as these parts which have been omitted form no part of my invention and are generally well known in the art. Fig. 2 is a perspective view partly broken away of the drum and lever'piece which is operated by the buttons of the switch, and Fig. 3 is a perspective view of a sliding engagement bar, Fig. 4 is an enlarged cross sectional view illustrating my preferred method of securing the knife to the knife bar, and Fig. 5 illustrates another method of securing the knife to the knife bar.

4 is an integral frame preferably stamped or punched out of sheet metal preferably in the form shown and serves as a bearing for the pin 5 upon which is mounted the drum and bar piece shown to better advantage in Fig. 2. 6 and 7 are the usual buttons for a switch of this type and are pivotally connected to the bar 8 of the drum 9 by the connecting rods 10 and 11 as shown. 12 is a coil spring mounted upon the drum 9, one extremity of which engages the offset 13 of the drum and the other extremity of which engages the ofi'set 14 of the bar 15 which is also mounted upon the pin 5 above the top of the frame as shown and carries the knife 27. I Vith the parts in this position it will be readily understood that when the buttons 6 and 7 are operated the bar 8 and the drum will rotate and owing to the spring connec Specification of Letters Patent.

Serial No. 669,256.

by the projection 17 of the slide 18. By referring now more particularly to Fig. 3 it will be observed that the slide piece 18 is provided with a central longitudinal cut away portion 19 by which it is mounted upon the pin 20 is another cut away portion in the slide piece 18 which is engaged by the projection 21 of the bar 8 and 22 is another cut away portion of the slide piece 18 which is engaged by the projection 28 .of the frame 4. From this it will be seen that as the bar 8 is rotated by one of the buttons, the projection- 21 thereof engaging the cut away portion- 20 of the slide 18 causes the latter to move longitudinally, thus it will be observed that the projection 17 is introduced in and out of the path of the offset 14 of the bar 15. The bar 15 is prox'ided with a knife 27 to engage the clip terminals of the circuit so that when the white button 7 is pressed the bar 8 swings the drum lefthandedly causother end of said spring being held against Patented May 2 19m.

the offset 14 which is now locked by the projection 17 of the slide 18. It will be observed that as the white button 7 is pressed and the tension of the spring 12 is being thus increased, the slide 18 is moving inwardly and will continue to do so until the projection 17 clears the offset 14. This ofl'set then hav ing been released will fly leftwardly causing the knife 27 to engage the knife clip terminals and close the circuit.

lVhen the lights are to be put out the button 6 is pnessed as usual and the coil spring 12 is new. engaged by the ofiset 13 and its tension increased thereby, the other end of the firing being retained by the oflset 14 which is again locked by the projection 17 and is not released until the slide 18 has moved outwardly sufliciently When the offset 14 is again released from the projection 17, the bar 15 flies rightwardly disen gaging the knife 27 from the clip terminals and the circuit is broken. Thus it will be seen that the circuit is made through the knife 27 and does not have to pass through any other part of the apparatus.

The upper portion of the frame 4 is cut away forming stops as shown at 24 thus serving to limit the movement of the offset 14in its swinging movement rightwardly or leftwardly.

25 and 26 are oflsets or lugs punched or stamped out of the frame 4 which serve as a.

means for securing the apparatus to the usual porcelain block or box as the case may be.

Referring now to Fig. 2 it will be observed that the entirebar and drum piece is formed out of a single-piece of metal, likewise the slide piece 18 shown in Fig. 3. The

, Figs. 1, and 5, 28 is the pin or rivet by which the knife 27 is secured to the knife bar 15. 29 and 30 are washers of mica, fiber or other suitable insulating material supported by a similar washer indicated by the reference character 31. 32 and are washers preferably of metal although the same may be made of insulating material and are each provided with an up-turned interior edge as shown so that when the rivet or pin 28 is fastened down, held upon the upper washer 31, the combination is securely held in place although a little play may be allowed for the knife 27 as shown. In the arrangement shown in Fig. 5 the upper washer 30 is preferably forced down substantially as shown and instead of using the flanged washers 32 and 33 a washer of the formation indicated by reference 35 is preferably used.v In this casean extra washer such as shown at 36 may be employed to receive the head of the rivet or pin.

Of course it will be readily understood that various modifications may be made without departing from the spirit of the invention as set forth in the claims.

' I claim:

1. An electric switch comprising a frame,

a button bar and a knife bar oscillatablymounted therein, each of said bars having offsets, and said button bar having a drum, a sprlng upon said drum engaging said offsets, a slide adapted to be operated directly hold and release said knife bar when said button bar is operated.

3. An electric switch comprising a frame, a button bar and a knife bar oscillatably mounted therein, each of said bars having offsets, and said button bar having a drum,

a spring upon said drum engaging said offsets, a slide adapted to be operated directly by said button bar and having engaging means adapted to directly hold and release said knife bar when said button bar is operated, a contact knife mounted upon said knife bar, said knife mounting comprising a metallic seating for said knife, insulating material within said seating and insulating material at opposite sides thereof, and a pin through said knife bar and said insulating material.

4. An electric switch comprising a-fra'me, a button bar and a knife bar mounted to oscillate therein, each of said bars having olfsets, a spring engaging said offsets, a slide adapted to be operated by said button bar and having engaging means adapted to hold and release said knife bar when said button bar is operated, and stops in combination with said frame for limiting the movement of said knife bar.

In testimony whereof I affix my signature in presence of two witnesses.

GODFREY P. SCHMIDT. lVitnesses:

LOUISE EXDERLE, AUG. P. Junennsnx.

Copies of thin patent may be obtained for five cents each, by addressirg the "Commissioner of Patents.

Washington, 1L0. 

